Extract:
What punctuation is needed in the following sentence to make it correct?
The days seem long but the nights seem even longer.
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A
Period
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B
Comma
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C
Colon
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D
Apostrophe
A comma is needed before the coordinating conjunction "but" to join two independent clauses.
A) Period
A period would create a comma splice fragment if used alone, but actually using a period would correctly separate the clauses into two sentences. However, the question asks for punctuation within the single sentence shown.
B) Comma
Comma correctly joins two independent clauses ("The days seem long" and "the nights seem even longer") when paired with coordinating conjunction "but." Standard punctuation requires comma before FANBOYS conjunctions connecting independent clauses.
C) Colon
Colons introduce lists, explanations, or elaborations—not coordinate clauses of equal weight. Using a colon here would imply the second clause explains the first, which it doesn't.
D) Apostrophe
Apostrophes form possessives or contractions—not clause connections. No possessive or contraction exists requiring apostrophe punctuation.
Conclusion
Coordinating conjunctions (FANBOYS: for, and, nor, but, or, yet, so) require preceding commas when joining two independent clauses. Both segments can stand alone as complete sentences, making comma + "but" the grammatically standard connection method.